package io;
//缓冲流 流连接中做加速的
import java.io.*;

public class CopyDemo3 {
    public static void main(String[] args) throws IOException {
        FileInputStream fis=new FileInputStream("ppt_cp.pptx");
        //BufferedInputStream bis=new BufferedInputStream(fis);
        BufferedInputStream bis=new BufferedInputStream(fis,1024*10);

        FileOutputStream fos=new FileOutputStream("ppt_cp2.pptx");
        //BufferedOutputStream bos=new BufferedOutputStream(fos);
        BufferedOutputStream bos=new BufferedOutputStream(fos,1024*10);

        int d=0;
        long start=System.currentTimeMillis();
        while ((d=bis.read())!=-1){
            bos.write(d);
        }
        long end=System.currentTimeMillis();
        System.out.println("复制完毕耗时"+(end-start)+"ms");

        bis.close();
        bos.close();
    }
}
